It is highly unlikely that pears could cause constipation, and in fact they are likely to have the opposite effect. Due to the high amount of fiber that pears contain, they are sometimes used as a remedy for constipation.
An underwriter is a company or other entity that administers the public issuance and distribution of securities from a corporation or other issuing body.
Underwriting services are provided by some large specialist financial institutions, such as banks, insurance or investment houses, whereby they guarantee payment in case of damage or financial loss and accept the financial risk for liability arising from such guarantee.